Music Teachers - what are the commonest bad playing habits that you see? Just interested, as it's far easier to nip things in the bud and do things correctly from the outset rather than have to unlearn stuff and then do it correctly. (I had to change my embouchure back in my teens - I'd been playing into the top of the mouthpiece rather than the middle - took me ages to fix that). And if we have a bad habit ourselves do we have a blindspot to that fault in others? Or does it make us 'specially critical? And are there some bad habits we should really just overlook as it's just too much grief to fix them?